December 15 will mark the final performance by the French-Canadian singer at Caesars Palace.
Since March, 2003, Dion has performed more than 500 shows for $100 million. A fourth year was added to the original contract.
In a statement, Dion said, "As we prepare ourselves to say goodbye, I know this will be the best year yet."
The final year will bring some changes to the show, including new costumes. At the end of January, the show, entitled A New Day, will be recorded for a televised special and DVD.